Various (R)- and (S)-1-trimethylsilyl-1-alkyn-3-ols, chiral building units useful for the synthesis of biologically active compounds, have been efficiently resolved by enantioselective acetylation mediated by immobilized lipase PS. The resolution is applied to the synthesis of (R)- and (S)-5-octyl-2-(5H)-furanones. (C) 1997, Elsevier Science Ltd. All rights reserved.
NIWA, SEIJI;SOAI, KENSO, J. CHEM. SOC. PT 1. PERKIN TRANS.,(1990) N, C. 937-943
作者:NIWA, SEIJI、SOAI, KENSO
DOI:——
日期:——
Efficient Synthesis of Optically Active 2,3-Allenols via the Simple CuBr-Mediated Reaction of Optically Active Propargylic Alcohols with Paraformaldehyde
作者:Shengming Ma、Hairong Hou、Shimin Zhao、Guangwei Wang
DOI:10.1055/s-2002-33656
日期:——
Enantiomerically enriched 2,3--allenols were prepared by the GuBr-mediated homologation of the relatively easily available opticallyactive teminal propargylic alcohols with paraformaldehyde in the presence of diisopropylamine.
ASYMMETRIC ADDITION OF ACETYLIDE TO ALIPHATIC ALDEHYDES—PREPARATION OF OPTICALLY ACTIVE 5-OCTYL-2(5<i>H</i>)-FURANONE—
作者:Teruaki Mukaiyama、Keisuke Suzuki
DOI:10.1246/cl.1980.255
日期:1980.3.5
Various optically active acetylenic alcohols (40-80%e.e.) were obtained by enantioface-differentiatingaddition of lithium trimethylsilylacetylide to aliphatic aldehydes utilizing (2S, 2′S)-2-hydroxymethyl-1-[(1-methylpyrrolidin-2-yl)methyl]pyrrolidine as a chiralligand. Optically active (R)-1-trimethylsilyl-l-undecyn-3-ol (80%e.e.) was transformed into optically active 5-octyl-2(5H)-furanone in good